Tobin was serving three life terms for the murders of Angelika Kluk, Vicky Hamilton and Dinah McNicol.
Serial killer Peter Tobin has died aged 76, sources have told the BBC.
Tobin was convicted of raping and murdering Polish student Angelika Kluk, 23, and hiding her body under the floor of a Glasgow church in 2006.
He was also serving life terms at HMP Edinburgh for the murders of 15-year-old Vicky Hamilton and 18-year-old Dinah McNicol.
Vicky, of Redding, near Falkirk, and Dinah, of Tillingham, Essex, both vanished in 1991.
Their bodies were found 17 years later, buried in the garden of Tobin’s former home in Margate, Kent.
Last month, a newspaper reported that Tobin was lying “chained to a hospital bed” and was pictured in a hospital gown, appearing seriously ill.
The Sunday Mail said the murderer had fallen and broken his hip and was refusing food and medication.
In January it emerged that Tobin had been transferred from HMP Edinburgh to the city’s Royal Infirmary after becoming unwell.
In February 2016 he was taken to the Royal Infirmary by ambulance after he reportedly collapsed in his cell.